US3743526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry pigment preparations and process for their manufacture
Assignee: Novartis AG
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Filing: 1972-01-26
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Granted: 1973-07-03
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Expires: 1992-01-26
Abstract
Abstract PREPARATIONS CONTAINING AT LEAST ONE WATER-INSOLUBLE DYESTUFF AND/OR AT LEAST ONE OPTICAL BRIGHTENER AND AT LEAST ONE POLYHYDROXYLATED ORGANIC COMPOUND ESTERIFIED WITH AT LEAST ONE POLYBASIC INORGANIC ACID, ESPECIALLY A CELLULOSE SULFURIC ACID ESTER, ARE USEFUL FOR PIGMENTING AQUEOUS SOLUTIONS.
Inventors
- 👤 G Zwahlen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:20
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; C; C09; C09B; C09B67/00; C09B67/0071; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/12; D01F2/14; D06; D06P; D06P1/00; D06P1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |